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((Short description|Surveillance from and of the outer space environment))
((refimprove|date=January 2017))
((redirect-distinguish|Space surveillance|Reconnaissance satellite))

'''Space domain awareness''' is the study and monitoring of satellites [[orbit]]ing the [[Earth]]. It involves the detection, tracking, cataloging and identification of artificial objects, i.e. active/inactive [[satellite]]s, spent [[rocket]] bodies, or [[Space debris|fragmentation debris]].

==Aims==
Space domain awareness accomplishes the following:

* Predicting when and where a decaying space object will [[Atmospheric entry|re-enter]] the [[Earth's atmosphere]];
* Preventing a returning space object, which to [[radar]] looks like a missile, from triggering a [[false alarm]] in missile-attack warning sensors;<ref name=":0">((Cite web|url=http://www.au.af.mil/au/awc/awcgate/usspc-fs/space.htm|title=Space Surveillance|website=www.au.af.mil|access-date=2016-12-06))</ref>
* Charting the present position of space objects and plot their anticipated orbital paths;
* Detecting new man-made objects in space;
* Producing a running catalogue of man-made space objects;
* Determining which country owns a re-entering space object;<ref name=":0" />
* Informing countries whether or not objects may interfere with [[satellite]]s and [[International Space Station]] orbits;
* Providing data for future [[Anti-satellite weapon|anti-satellite weapons systems]].

==Systems==
[[File:The Night Watchmen (3388916).jpeg|thumb|Ground-based electro-optical deep-space surveillance telescopes at [[White Sands Missile Range]].]]
Systems include:
* The DEEP-Sight prototype, designed by Deepinder Uppal on behalf of the Defense Innovation Unit, this system is designed to provide space domain awareness across a broad-spectrum of SDA use cases to Space Force, the United States Navy and PSRA (Public Satellite Research and Analysis) teams. <ref>((cite web | url=https://www.diu.mil/latest/commercial-space-industry-providing-tools-to-advance-and-augment-space | title=DIU ))</ref>
* The [[United States Space Surveillance Network]] which has detectors such as the [[Space Fence]] (replacing the now defunct [[Air Force Space Surveillance System]]) and [[Space Surveillance Telescope]]<ref name=":0" />
* The Russian [[Centre for Outer Space Monitoring]] with facilities such as [[Okno]] and [[Krona space object recognition station|Krona]] and [[Sazhen-S]], used to analyse the orbital parameters of space craft.
* The French [[Graves_(system)|GRAVES (Grand Réseau Adapté à la Veille Spatiale)]] [[bi-static radar]]-based space surveillance system deploy by French Air Force
* The European [[Space Situational Awareness Programme]] with multiple assets in its [[Space Situational Awareness Programme#Space Surveillance and Tracking Segment|Space Surveillance and Tracking Segment]]
* The Australian based [[Silentium Defence]] Oculus [[passive radar]] space observatory in [[Swan Reach, South Australia]]<ref name="space-gov-tracks-14-11-22">((cite web |title=World-class observatory to track space objects |url=https://www.space.gov.au/news-and-media/world-class-observatory-track-space-objects |website=www.space.gov.au |publisher=Australian Space Agrency |access-date=9 January 2024 |date=14 November 2022))</ref>
* The American [[National Reconnaissance Office]]'s Skybarker satellites<ref>((Cite web |title=Silentbarker |url=https://space.skyrocket.de/doc_sdat/silentbarker.htm |access-date=2023-09-12 |website=Gunter's Space Page |language=en))</ref>
[[File:Silentium Defence Passive Radar for SDA - low resolution 2.jpg|thumb|Silentium Defence Oculus Observatory]]

== References ==
((Reflist))

== External links ==
* [http://www.au.af.mil/au/awc/awcgate/usspc-fs/space.htm United States Space Surveillance]

((Politics of outer space))

[[Category:Space technology]]
[[Category:Surveillance]]
[[Category:Space debris]]

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